Maryam Mehdizade, Hossein Keshavarz, Fatemeh Marashi-Najafi, Morteza Tayebi, Amir Mostafaei, Ali Reza Eivani
{"title":"A comprehensive review of microstructure and mechanical properties of friction stir processed magnesium alloys and composites","authors":"Maryam Mehdizade, Hossein Keshavarz, Fatemeh Marashi-Najafi, Morteza Tayebi, Amir Mostafaei, Ali Reza Eivani","doi":"10.1016/j.jma.2025.08.017","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.017","url":null,"abstract":"Friction stir processing (FSP) induces severe plastic deformation, generating intense strains and localized heating, which modifies the surface and enables the fabrication of magnesium (Mg)-based composites. This technique refines the microstructure of Mg alloys, enhancing mechanical properties—particularly ductility, a key limitation of these HCP alloys. This review addresses the underlying microstructural evolution during FSP of Mg alloys and Mg-matrix composites, including (i) grain refinement via continuous and discontinuous dynamic recrystallization (CDRX and DDRX), (ii) fragmentation and redistribution of secondary phases and intermetallics, (iii) transformation of low- and high-angle grain boundaries, and (iv) additional microstructural changes induced by external reinforcements. This review provides a comprehensive analysis of the strengthening mechanisms and their impact on the mechanical properties of FSP Mg alloys and Mg-matrix composites (MMCs). The paper examines the correlation between FSP processing parameters, microstructural evolution, and resulting mechanical properties. It critically highlights how the type of reinforcement and the dynamic recrystallization induced by friction stir processing influence grain boundary character and, consequently, the material’s strengthening response. It includes a comparative evaluation of yield stress, ultimate tensile strength, microhardness, elongation, and fractography for various FSP-treated Mg alloys and MMCs, including AZxx, WExx, ZExx, ZKxx, AMxx, AExx, and Mg-rare earth alloys. Additionally, the novelty of this review lies in its emphasis on connecting microstructural transformations to mechanical performance trends across different alloy systems and processing strategies, an aspect that has been underexplored in previous reviews. Recent advancements in FSP techniques and their implications for improving the performance of Mg-based materials are also discussed.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"14 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145127805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Designing trimetallic Ni-Mg-Mn selenide and bio-derived carbon electrodes for wearable semi-solid-state hybrid capacitor applications","authors":"Manchi Nagaraju, Jae Su Yu","doi":"10.1016/j.jma.2025.08.025","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.025","url":null,"abstract":"Trimetallic selenides have emerged as a promising electrode for wearable supercapacitors applications, due to their high electrical conductivity, rich redox activity, structural robustness, and porosity. In this report, a trimetallic nickel–magnesium-manganese selenide (NMMSe) electrode with a well-defined nanosphere morphology was prepared using a low-cost and rapid electrodeposition technique. The electrochemical performance of the NMMSe electrodes was systematically investigated as a positive electrode. The NMMSe electrode prepared with a deposition time of 200 s (denoted as NMMSe-200) revealed a high areal/specific capacity of 439.4 µAh cm<sup>−2</sup>/225.6 mA h <em>g</em><sup>−1</sup> at 4 mA cm<sup>–2</sup>, along with excellent cycling stability. To further investigate the effect of deposition time on the nanostructure evaluation and electrochemical behavior, additional NMMSe electrodes were synthesized at the growth times of 100 and 300 s. For the negative electrode, activated carbon derived from pistachio shell waste (i.e., porous activated carbon (PAC)) was employed, demonstrating a high areal capacitance of 913.4 mF cm<sup>−2</sup> and an excellent surface area of 320.6 m<sup>2</sup>/g. Finally, a semi-solid-state hybrid capacitor (HC) cell was assembled using NMMSe-200 as the positive (+) electrode and PAC as the negative (-) electrode. The resulting NMMSe//PAC/nickel foam HC cell delivered an impressive areal capacitance of 928.8 mF cm<sup>−2</sup> at 2 mA cm<sup>–2</sup>, a high energy density of 338.5 µWh cm<sup>–2</sup> (56.4 Wh kg<sup>−1</sup>), and exceptional cycling stability. These results highlight the strong potential of NMMSe-200 electrodes for high-performance, wearable energy storage systems.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"131 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145116536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Reyes-Riverol, G. Callaghan, F.R. García-Galván, Á. Triviño-Peláez, J. Medina, G. Williams, J.A. Jiménez, S. Fajardo
{"title":"Microstructure and electrochemical behavior of AZ91 Mg Alloy produced by laser powder bed fusion","authors":"R. Reyes-Riverol, G. Callaghan, F.R. García-Galván, Á. Triviño-Peláez, J. Medina, G. Williams, J.A. Jiménez, S. Fajardo","doi":"10.1016/j.jma.2025.08.002","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.002","url":null,"abstract":"The corrosion behavior of the laser powder bed fusion (LPBF) AZ91 magnesium alloy was investigated by comparing its longitudinal and transverse sections with the cast AZ91 alloy. Microstructural analysis revealed a fine, homogeneous Mg<sub>17</sub>Al<sub>12</sub> distribution in LPBF samples, contrasting with the network-like structure in the cast alloy. Electrochemical and hydrogen evolution tests demonstrated no significant anisotropy in LPBF sections, but they exhibited higher corrosion rates than the cast alloy. Potentiodynamic polarization and electrochemical impedance spectroscopy confirmed that the corrosion process was cathodically controlled by the Mg<sub>17</sub>Al<sub>12</sub> phase fraction. Scanning vibrating electrode technique further validated these findings, highlighting lower electrochemical activity in cast AZ91 alloy.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"17 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145116537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Franziska Ueberschär, Simon Schmidt, Kristina Kittner, Simon Pöstges, Madlen Ullmann, Alexander Kopp, Ulrich Prahl
{"title":"Tailoring microstructure and performance of WE43MEO magnesium alloy via multi-pass hot rolling and finishing heat treatment towards foils for biomedical support structures","authors":"Franziska Ueberschär, Simon Schmidt, Kristina Kittner, Simon Pöstges, Madlen Ullmann, Alexander Kopp, Ulrich Prahl","doi":"10.1016/j.jma.2025.08.006","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.006","url":null,"abstract":"WE43MEO magnesium foils (thickness ≤ 200 µm) were successfully produced via hot rolling. The initially extruded material was heat treated at 450 °C for 2 h to achieve a more homogenous microstructure. Afterwards the sheets were hot rolled at 480 °C in two to five rolling passes to achieve a uniform thickness of less than 200 µm and finally heat treated (T5 and T6 heat treatment). After foil rolling and final heat treatment the microstructural und texture evolution as well as resulting mechanical properties were investigated. Therefore, the samples were quenched directly after foil rolling and the final heat treatment. The foil rolling led either to a deformation microstructure (two and three passes) or globular grains (four and five passes) depending on the number of rolling passes. As main recrystallisation mechanisms continuous dynamic recrystallisation (CDRX) and twinning induced dynamic recrystallisation (TDRX) were identified. The resulting textures revealed the activation of non-basal slip of <<em>c</em> + <em>a</em>>-dislocations during prior foil rolling. As a result of the rolling, the strength increased and the elongation decreased compared to the extruded and heat-treated state. Furthermore, it was found that a T6 temper increased corrosion resistance of the tested WE43MEO foils.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"54 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145093657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Solid-state additively manufactured Mg-Al-Zn-Mn alloys: Effects of Al content on microstructures and mechanical properties","authors":"Hui Wang, Yidi Li, Ruilin Lai, Chenying Shi, Biaobiao Yang, Yunping Li","doi":"10.1016/j.jma.2025.08.022","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.022","url":null,"abstract":"Additive friction stir deposition (AFSD), as an advanced solid-state additive manufacturing technique, offers significant potential for fabricating large-scale engineering structural components. In this study, Mg-<em>x</em>Al-1Zn-0.5Mn (<em>x</em> = 3, 6, and 9 wt. %) alloys were fabricated via AFSD. And the effect of Al content on the microstructural evolution, mechanical properties, and fracture behavior was systematically investigated. The results reveal that all AFSD AZ series Mg alloys exhibit refined equiaxed grains and a typical basal texture, with the (0002) axis parallel to the build direction (BD). However, increasing Al content results in a gradual decrease in both average grain size and basal texture intensity. Alloy with low content of Al (≤ 6 wt. %) exhibits uniform grain size and precipitate distribution, whereas alloy with high content of Al (e.g., 9 wt. %) displays a bimodal structure composed of fine grain bands decorated by β-Mg<sub>17</sub>Al<sub>12</sub> phase near grain boundaries and coarse grain bands. For this, a clear strength-ductility trade-off is observed: with increasing Al content, the yield strength rises from 152.8 ± 17.9 MPa to 215.5 ± 17.7 MPa, accompanied by a reduction in fracture elongation from 15.9 ± 0.6 % to 12.3 ± 0.6 %. These findings can offer theoretical insight and practical guidance for the AFSD AZ series (Mg-Al-Zn-Mn) alloys with synergistic strength and ductility.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"22 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
RK Singh Raman, Amal Sibi, Dandapani Vijayshankar, M.J.N.V. Prasad, G. Keerthiga, Solomon Ansah, Saad Al-Saadi, Jafar Albinmousa
{"title":"Protein in physiological fluid resists premature fracture of a magnesium alloy: Unique, remarkable and contrasting influences on stress corrosion cracking and corrosion","authors":"RK Singh Raman, Amal Sibi, Dandapani Vijayshankar, M.J.N.V. Prasad, G. Keerthiga, Solomon Ansah, Saad Al-Saadi, Jafar Albinmousa","doi":"10.1016/j.jma.2025.08.036","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.036","url":null,"abstract":"Though magnesium (Mg) alloys are highly attractive for their use as biodegradable/temporary implants, they can be critically compromised in such applications due to their susceptibility to corrosion and stress corrosion cracking (SCC) in human body fluid (such as Hanks’ solution). This study investigated the role of additions of bovine serum albumin (BSA) and glucose to Hanks’ solution in SCC of a Mg alloy, ZK60. The study reproducibly demonstrated the novel and unique characteristic of the acutely elliptical shape of the overall fracture surface of alloy subjected to SCC tests, exclusively when BSA was added to the Hanks’ solution, whereas tests in the Hanks’ solution without BSA produced the fracture surface of usual circular shape. Also, the BSA addition to the Hanks’ solution produced contrasting influences on SCC and electrochemical corrosion. The study provides a comprehensive mechanistic explanation for the two phenomena.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"51 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145077456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of rotary swaging on the microstructure and mechanical properties of Mg-Zn-Ca/SiCp composites","authors":"Hongwei Xiong, Lidong Gu, Mingdi Yu, Wenfei Luo, Jingya Wang, Chenyang Jiang, Liping Zhou, Tao Ying, Xiaoqin Zeng","doi":"10.1016/j.jma.2025.08.031","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.031","url":null,"abstract":"Due to the poor plasticity and deformability, magnesium matrix composites are difficult to strengthen using traditional severe plastic deformation (SPD) processes. In this study, we applied a large deformation of 0.36 to SiC particles reinforced Mg-Zn-Ca (ZX50/SiCp) composites at room temperature via rotary swaging (RS). The RS process significantly increased the yield strength of the composite from 174.1 MPa after extrusion to 346.5 MPa after RS with ten passes, representing a 98% enhancement. The remarkable strengthening effect was primarily attributed to grain boundaries strengthening, dislocation strengthening and precipitation strengthening effects. The results indicated that the average grain size of the composite refined to 16 µm after ten passes, and a substantial number of deformation twins were developed in the host grains. The interactions between twin boundaries and precipitates as well as reinforcement particles blocked the twin growth, resulting in dense twin networks. With increasing strain, multiple twins developed to further refine the twin lamella. Furthermore, the activation of numerous dislocations developed dislocation arrays and the geometrically necessary dislocations (GNDs) density increased from 2.8 × 10¹⁴ to 7.2 × 10¹⁴ m⁻². In addition, dynamic precipitation occurred during the RS process, resulting in the formation of substantial nano-scale Mg-Zn second phases (average diameter ∼70 nm). The severe shear strain during the RS process promoted the uniformly dispersion of reinforcement particles. These findings provide valuable insights into the fabrication and strengthening of magnesium matrix composites through the proposed RS process.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"314 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145077494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lixiang Ma, Lu Zhang, Zhuohan Zhang, Qiuming Peng, Shumin Han, Yuan Li
{"title":"Innovative applications of single-atom catalysts in MgH2/Mg system to build high-efficiency hydrogen storage","authors":"Lixiang Ma, Lu Zhang, Zhuohan Zhang, Qiuming Peng, Shumin Han, Yuan Li","doi":"10.1016/j.jma.2025.08.018","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.018","url":null,"abstract":"MgH<sub>2</sub> shows significant potential for a solid-state hydrogen storage medium due to the advantages of high hydrogen capacity, excellent reversibility, and low cost. However, its large-scale application still requires overcoming significant thermodynamic and kinetic hurdles. Catalyst design and optimization enhancements are crucial for the hydrogen storage properties of MgH<sub>2</sub>, wherein single-atom catalysts, characterized by their small size and high proportion of unsaturated coordination sites, have recently demonstrated a significant advance and considerable promise in this regard. This review presents recent progress on state-of-the-art single-atom catalysts for enhancing MgH<sub>2</sub> hydrogen storage, examining both supported and unsupported catalyst types, <em>i.e.,</em> transition metal @ N-modified carbon materials and transition metal @ transition metal compounds, and metallene-derived compounds and single-atom alloys, respectively. We systematically discussed the single-atom catalysts in MgH<sub>2</sub> hydrogen storage systems, focusing on synthesis strategies, characterization techniques, catalytic mechanisms, as well as existing challenges and future perspectives. We aimed to provide a comprehensive and cohesive understanding for researchers in the field, and promote the development of single-atom catalysts and their significant optimization of the hydrogen storage performance of MgH<sub>2</sub>.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"54 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145084027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Anodes for magnesium batteries: State-of-the-art and prospects. A viewpoint","authors":"Maximilian Fichtner","doi":"10.1016/j.jma.2025.08.034","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.034","url":null,"abstract":"There is an increasing demand for rechargeable batteries in high-performance energy storage systems. The current dominating Li ion batteries are limited by price fluctuations of resources, resource availability, as well as their theoretical capacities so that the community is exploring alternative battery chemistries to expand the portfolio of available battery types. As a promising multivalent battery type, rechargeable magnesium batteries (RMBs) have attracted increasing attention because of high safety, high volumetric energy density, and low cost due to the high geological abundance of Mg. The high theoretical energy density comes from the fact that Mg can be used in undiluted form as a metal anode in RMB. This anode can provide high coulombic efficiency without dendrite formation upon charging with selected electrolytes and under reasonable conditions [<span><span>1</span></span>]. However, despite these benefits, the implementation of magnesium batteries has been obstructed by several significant roadblocks.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"37 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145077490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":" Slip-dominated deformation mechanisms and tensile anisotropy of rolled Mg-6.3Gd-3Li-2Zn-0.5Al alloy based on crystal plasticity analysis","authors":"Xiaohua Zhang, Jiaqi Li, Lin Wang, Yuansheng Cheng, Wei Lei, Qiang Chen","doi":"10.1016/j.jma.2025.08.032","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.032","url":null,"abstract":"In this work, mechanical properties, the tensile anisotropy, and deformation mechanisms during tensile testing of rolled Mg-6.3Gd-3Li-2Zn-0.5Al alloys (R2 and R4) were analyzed with Visco-Plastic Self-Consistent (VPSC) model and material characterization techniques. The results showed that the mechanical properties of the rolled Mg-Gd-Li alloy displayed considerable anisotropy, with highest yield strength and tensile strength along the rolling direction (RD) measured at 272.3 MPa and 294.5 MPa, respectively. Conversely, the yield and tensile strength in the transverse direction (TD) were merely 214.7 MPa and 253.1 MPa, respectively. Furthermore, the anisotropy increased with the deformation. The VPSC models for rolled Mg-Gd-Li alloy in tensile deformation were constructed, respectively, by adjusting the hardening parameters. Pyramidal <<em>c</em> + <em>a></em> slip, which dominated the deformation mechanisms of Mg-Gd-Li alloy, was calculated via VPSC model and observed in electron backscatter diffraction (EBSD) data. The stress-strain curves and pole figures generated from the VPSC model exhibited excellent agreement with experimental results. For the rolled Mg-Gd-Li alloy, the activation levels of basal <<em>a</em>> slip along different tensile directions were the main cause of the anisotropy in yield strength. On the other hand, the activation levels of (10–12) twinning during deformation in various tensile orientations were primarily responsible for the anisotropy in tensile strength.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"24 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145067752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}